66 Block Series Protects Telecom and Intercom Circuits with Field-replaceable ModulesDITEK’s 66 Block Series modular surge protectors are designed to provide protection to telecom and intercom circuits, including POTS, CO, digital, and call-in circuit types. Models cover all the common voltage protection needs, from 14V intercom call-in circuits, to 25V and 30V analog and speaker circuits, 30V digital circuits, 50V off-premise extensions, and 130V POTS and CO telco circuits. Most models include built-in diagnostic test points. Select models available with self-resetting fuses.
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